module.exports =
    /******/ (function (modules) { // webpackBootstrap
    /******/ 	// The module cache
    /******/
    var installedModules = {};
    /******/
    /******/ 	// The require function
    /******/
    function __webpack_require__(moduleId) {
        /******/
        /******/ 		// Check if module is in cache
        /******/
        if (installedModules[moduleId]) {
            /******/
            return installedModules[moduleId].exports;
            /******/
        }
        /******/ 		// Create a new module (and put it into the cache)
        /******/
        var module = installedModules[moduleId] = {
            /******/            i: moduleId,
            /******/            l: false,
            /******/            exports: {}
            /******/
        };
        /******/
        /******/ 		// Execute the module function
        /******/
        modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
        /******/
        /******/ 		// Flag the module as loaded
        /******/
        module.l = true;
        /******/
        /******/ 		// Return the exports of the module
        /******/
        return module.exports;
        /******/
    }

    /******/
    /******/
    /******/ 	// expose the modules object (__webpack_modules__)
    /******/
    __webpack_require__.m = modules;
    /******/
    /******/ 	// expose the module cache
    /******/
    __webpack_require__.c = installedModules;
    /******/
    /******/ 	// define getter function for harmony exports
    /******/
    __webpack_require__.d = function (exports, name, getter) {
        /******/
        if (!__webpack_require__.o(exports, name)) {
            /******/
            Object.defineProperty(exports, name, {enumerable: true, get: getter});
            /******/
        }
        /******/
    };
    /******/
    /******/ 	// define __esModule on exports
    /******/
    __webpack_require__.r = function (exports) {
        /******/
        if (typeof Symbol !== 'undefined' && Symbol.toStringTag) {
            /******/
            Object.defineProperty(exports, Symbol.toStringTag, {value: 'Module'});
            /******/
        }
        /******/
        Object.defineProperty(exports, '__esModule', {value: true});
        /******/
    };
    /******/
    /******/ 	// create a fake namespace object
    /******/ 	// mode & 1: value is a module id, require it
    /******/ 	// mode & 2: merge all properties of value into the ns
    /******/ 	// mode & 4: return value when already ns object
    /******/ 	// mode & 8|1: behave like require
    /******/
    __webpack_require__.t = function (value, mode) {
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        if (mode & 1) value = __webpack_require__(value);
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        if (mode & 8) return value;
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        if (mode & 2 && typeof value != 'string') for (var key in value) __webpack_require__.d(ns, key, function (key) {
            return value[key];
        }.bind(null, key));
        /******/
        return ns;
        /******/
    };
    /******/
    /******/ 	// getDefaultExport function for compatibility with non-harmony modules
    /******/
    __webpack_require__.n = function (module) {
        /******/
        var getter = module && module.__esModule ?
            /******/            function getDefault() {
                return module['default'];
            } :
            /******/            function getModuleExports() {
                return module;
            };
        /******/
        __webpack_require__.d(getter, 'a', getter);
        /******/
        return getter;
        /******/
    };
    /******/
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    /******/
    __webpack_require__.o = function (object, property) {
        return Object.prototype.hasOwnProperty.call(object, property);
    };
    /******/
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    __webpack_require__.p = "/dist/";
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    /******/ 	// Load entry module and return exports
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    return __webpack_require__(__webpack_require__.s = 58);
    /******/
})
/************************************************************************/
/******/({

    /***/ 0:
    /***/ (function (module, __webpack_exports__, __webpack_require__) {

        "use strict";
        /* harmony export (binding) */
        __webpack_require__.d(__webpack_exports__, "a", function () {
            return normalizeComponent;
        });
        /* globals __VUE_SSR_CONTEXT__ */

// IMPORTANT: Do NOT use ES2015 features in this file (except for modules).
// This module is a runtime utility for cleaner component module output and will
// be included in the final webpack user bundle.

        function normalizeComponent(
            scriptExports,
            render,
            staticRenderFns,
            functionalTemplate,
            injectStyles,
            scopeId,
            moduleIdentifier, /* server only */
            shadowMode /* vue-cli only */
        ) {
            // Vue.extend constructor export interop
            var options = typeof scriptExports === 'function'
                ? scriptExports.options
                : scriptExports

            // render functions
            if (render) {
                options.render = render
                options.staticRenderFns = staticRenderFns
                options._compiled = true
            }

            // functional template
            if (functionalTemplate) {
                options.functional = true
            }

            // scopedId
            if (scopeId) {
                options._scopeId = 'data-v-' + scopeId
            }

            var hook
            if (moduleIdentifier) { // server build
                hook = function (context) {
                    // 2.3 injection
                    context =
                        context || // cached call
                        (this.$vnode && this.$vnode.ssrContext) || // stateful
                        (this.parent && this.parent.$vnode && this.parent.$vnode.ssrContext) // functional
                    // 2.2 with runInNewContext: true
                    if (!context && typeof __VUE_SSR_CONTEXT__ !== 'undefined') {
                        context = __VUE_SSR_CONTEXT__
                    }
                    // inject component styles
                    if (injectStyles) {
                        injectStyles.call(this, context)
                    }
                    // register component module identifier for async chunk inferrence
                    if (context && context._registeredComponents) {
                        context._registeredComponents.add(moduleIdentifier)
                    }
                }
                // used by ssr in case component is cached and beforeCreate
                // never gets called
                options._ssrRegister = hook
            } else if (injectStyles) {
                hook = shadowMode
                    ? function () {
                        injectStyles.call(this, this.$root.$options.shadowRoot)
                    }
                    : injectStyles
            }

            if (hook) {
                if (options.functional) {
                    // for template-only hot-reload because in that case the render fn doesn't
                    // go through the normalizer
                    options._injectStyles = hook
                    // register for functioal component in vue file
                    var originalRender = options.render
                    options.render = function renderWithStyleInjection(h, context) {
                        hook.call(context)
                        return originalRender(h, context)
                    }
                } else {
                    // inject component registration as beforeCreate hook
                    var existing = options.beforeCreate
                    options.beforeCreate = existing
                        ? [].concat(existing, hook)
                        : [hook]
                }
            }

            return {
                exports: scriptExports,
                options: options
            }
        }


        /***/
    }),

    /***/ 18:
    /***/ (function (module, exports) {

        module.exports = require("element-ui/lib/checkbox");

        /***/
    }),

    /***/ 19:
    /***/ (function (module, exports) {

        module.exports = require("element-ui/lib/locale");

        /***/
    }),

    /***/ 2:
    /***/ (function (module, exports) {

        module.exports = require("element-ui/lib/utils/dom");

        /***/
    }),

    /***/ 28:
    /***/ (function (module, exports) {

        module.exports = require("element-ui/lib/transitions/collapse-transition");

        /***/
    }),

    /***/ 3:
    /***/ (function (module, exports) {

        module.exports = require("element-ui/lib/utils/util");

        /***/
    }),

    /***/ 4:
    /***/ (function (module, exports) {

        module.exports = require("element-ui/lib/mixins/emitter");

        /***/
    }),

    /***/ 58:
    /***/ (function (module, __webpack_exports__, __webpack_require__) {

        "use strict";
        __webpack_require__.r(__webpack_exports__);

// CONCATENATED MODULE: ./node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!./node_modules/vue-loader/lib??vue-loader-options!./packages/tree/src/tree.vue?vue&type=template&id=547575a6&
        var render = function () {
            var _vm = this
            var _h = _vm.$createElement
            var _c = _vm._self._c || _h
            return _c(
                "div",
                {
                    staticClass: "el-tree",
                    class: {
                        "el-tree--highlight-current": _vm.highlightCurrent,
                        "is-dragging": !!_vm.dragState.draggingNode,
                        "is-drop-not-allow": !_vm.dragState.allowDrop,
                        "is-drop-inner": _vm.dragState.dropType === "inner"
                    },
                    attrs: {role: "tree"}
                },
                [
                    _vm._l(_vm.root.childNodes, function (child) {
                        return _c("el-tree-node", {
                            key: _vm.getNodeKey(child),
                            attrs: {
                                node: child,
                                props: _vm.props,
                                "render-after-expand": _vm.renderAfterExpand,
                                "show-checkbox": _vm.showCheckbox,
                                "render-content": _vm.renderContent
                            },
                            on: {"node-expand": _vm.handleNodeExpand}
                        })
                    }),
                    _vm.isEmpty
                        ? _c("div", {staticClass: "el-tree__empty-block"}, [
                            _c("span", {staticClass: "el-tree__empty-text"}, [
                                _vm._v(_vm._s(_vm.emptyText))
                            ])
                        ])
                        : _vm._e(),
                    _c("div", {
                        directives: [
                            {
                                name: "show",
                                rawName: "v-show",
                                value: _vm.dragState.showDropIndicator,
                                expression: "dragState.showDropIndicator"
                            }
                        ],
                        ref: "dropIndicator",
                        staticClass: "el-tree__drop-indicator"
                    })
                ],
                2
            )
        }
        var staticRenderFns = []
        render._withStripped = true


// CONCATENATED MODULE: ./packages/tree/src/tree.vue?vue&type=template&id=547575a6&

// EXTERNAL MODULE: external "element-ui/lib/utils/merge"
        var merge_ = __webpack_require__(9);
        var merge_default = /*#__PURE__*/__webpack_require__.n(merge_);

// CONCATENATED MODULE: ./packages/tree/src/model/util.js
        var NODE_KEY = '$treeNodeId';

        var markNodeData = function markNodeData(node, data) {
            if (!data || data[NODE_KEY]) return;
            Object.defineProperty(data, NODE_KEY, {
                value: node.id,
                enumerable: false,
                configurable: false,
                writable: false
            });
        };

        var util_getNodeKey = function getNodeKey(key, data) {
            if (!key) return data[NODE_KEY];
            return data[key];
        };

        var findNearestComponent = function findNearestComponent(element, componentName) {
            var target = element;
            while (target && target.tagName !== 'BODY') {
                if (target.__vue__ && target.__vue__.$options.name === componentName) {
                    return target.__vue__;
                }
                target = target.parentNode;
            }
            return null;
        };
// EXTERNAL MODULE: external "element-ui/lib/utils/util"
        var util_ = __webpack_require__(3);

// CONCATENATED MODULE: ./packages/tree/src/model/node.js
        var _createClass = function () {
            function defineProperties(target, props) {
                for (var i = 0; i < props.length; i++) {
                    var descriptor = props[i];
                    descriptor.enumerable = descriptor.enumerable || false;
                    descriptor.configurable = true;
                    if ("value" in descriptor) descriptor.writable = true;
                    Object.defineProperty(target, descriptor.key, descriptor);
                }
            }

            return function (Constructor, protoProps, staticProps) {
                if (protoProps) defineProperties(Constructor.prototype, protoProps);
                if (staticProps) defineProperties(Constructor, staticProps);
                return Constructor;
            };
        }();

        function _classCallCheck(instance, Constructor) {
            if (!(instance instanceof Constructor)) {
                throw new TypeError("Cannot call a class as a function");
            }
        }


        var getChildState = function getChildState(node) {
            var all = true;
            var none = true;
            var allWithoutDisable = true;
            for (var i = 0, j = node.length; i < j; i++) {
                var n = node[i];
                if (n.checked !== true || n.indeterminate) {
                    all = false;
                    if (!n.disabled) {
                        allWithoutDisable = false;
                    }
                }
                if (n.checked !== false || n.indeterminate) {
                    none = false;
                }
            }

            return {all: all, none: none, allWithoutDisable: allWithoutDisable, half: !all && !none};
        };

        var reInitChecked = function reInitChecked(node) {
            if (node.childNodes.length === 0) return;

            var _getChildState = getChildState(node.childNodes),
                all = _getChildState.all,
                none = _getChildState.none,
                half = _getChildState.half;

            if (all) {
                node.checked = true;
                node.indeterminate = false;
            } else if (half) {
                node.checked = false;
                node.indeterminate = true;
            } else if (none) {
                node.checked = false;
                node.indeterminate = false;
            }

            var parent = node.parent;
            if (!parent || parent.level === 0) return;

            if (!node.store.checkStrictly) {
                reInitChecked(parent);
            }
        };

        var getPropertyFromData = function getPropertyFromData(node, prop) {
            var props = node.store.props;
            var data = node.data || {};
            var config = props[prop];

            if (typeof config === 'function') {
                return config(data, node);
            } else if (typeof config === 'string') {
                return data[config];
            } else if (typeof config === 'undefined') {
                var dataProp = data[prop];
                return dataProp === undefined ? '' : dataProp;
            }
        };

        var nodeIdSeed = 0;

        var node_Node = function () {
            function Node(options) {
                _classCallCheck(this, Node);

                this.id = nodeIdSeed++;
                this.text = null;
                this.checked = false;
                this.indeterminate = false;
                this.data = null;
                this.expanded = false;
                this.parent = null;
                this.visible = true;
                this.isCurrent = false;

                for (var name in options) {
                    if (options.hasOwnProperty(name)) {
                        this[name] = options[name];
                    }
                }

                // internal
                this.level = 0;
                this.loaded = false;
                this.childNodes = [];
                this.loading = false;

                if (this.parent) {
                    this.level = this.parent.level + 1;
                }

                var store = this.store;
                if (!store) {
                    throw new Error('[Node]store is required!');
                }
                store.registerNode(this);

                var props = store.props;
                if (props && typeof props.isLeaf !== 'undefined') {
                    var isLeaf = getPropertyFromData(this, 'isLeaf');
                    if (typeof isLeaf === 'boolean') {
                        this.isLeafByUser = isLeaf;
                    }
                }

                if (store.lazy !== true && this.data) {
                    this.setData(this.data);

                    if (store.defaultExpandAll) {
                        this.expanded = true;
                    }
                } else if (this.level > 0 && store.lazy && store.defaultExpandAll) {
                    this.expand();
                }
                if (!Array.isArray(this.data)) {
                    markNodeData(this, this.data);
                }
                if (!this.data) return;
                var defaultExpandedKeys = store.defaultExpandedKeys;
                var key = store.key;
                if (key && defaultExpandedKeys && defaultExpandedKeys.indexOf(this.key) !== -1) {
                    this.expand(null, store.autoExpandParent);
                }

                if (key && store.currentNodeKey !== undefined && this.key === store.currentNodeKey) {
                    store.currentNode = this;
                    store.currentNode.isCurrent = true;
                }

                if (store.lazy) {
                    store._initDefaultCheckedNode(this);
                }

                this.updateLeafState();
            }

            Node.prototype.setData = function setData(data) {
                if (!Array.isArray(data)) {
                    markNodeData(this, data);
                }

                this.data = data;
                this.childNodes = [];

                var children = void 0;
                if (this.level === 0 && this.data instanceof Array) {
                    children = this.data;
                } else {
                    children = getPropertyFromData(this, 'children') || [];
                }

                for (var i = 0, j = children.length; i < j; i++) {
                    this.insertChild({data: children[i]});
                }
            };

            Node.prototype.contains = function contains(target) {
                var deep = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;

                var walk = function walk(parent) {
                    var children = parent.childNodes || [];
                    var result = false;
                    for (var i = 0, j = children.length; i < j; i++) {
                        var child = children[i];
                        if (child === target || deep && walk(child)) {
                            result = true;
                            break;
                        }
                    }
                    return result;
                };

                return walk(this);
            };

            Node.prototype.remove = function remove() {
                var parent = this.parent;
                if (parent) {
                    parent.removeChild(this);
                }
            };

            Node.prototype.insertChild = function insertChild(child, index, batch) {
                if (!child) throw new Error('insertChild error: child is required.');

                if (!(child instanceof Node)) {
                    if (!batch) {
                        var children = this.getChildren(true);
                        if (children.indexOf(child.data) === -1) {
                            if (typeof index === 'undefined' || index < 0) {
                                children.push(child.data);
                            } else {
                                children.splice(index, 0, child.data);
                            }
                        }
                    }
                    merge_default()(child, {
                        parent: this,
                        store: this.store
                    });
                    child = new Node(child);
                }

                child.level = this.level + 1;

                if (typeof index === 'undefined' || index < 0) {
                    this.childNodes.push(child);
                } else {
                    this.childNodes.splice(index, 0, child);
                }

                this.updateLeafState();
            };

            Node.prototype.insertBefore = function insertBefore(child, ref) {
                var index = void 0;
                if (ref) {
                    index = this.childNodes.indexOf(ref);
                }
                this.insertChild(child, index);
            };

            Node.prototype.insertAfter = function insertAfter(child, ref) {
                var index = void 0;
                if (ref) {
                    index = this.childNodes.indexOf(ref);
                    if (index !== -1) index += 1;
                }
                this.insertChild(child, index);
            };

            Node.prototype.removeChild = function removeChild(child) {
                var children = this.getChildren() || [];
                var dataIndex = children.indexOf(child.data);
                if (dataIndex > -1) {
                    children.splice(dataIndex, 1);
                }

                var index = this.childNodes.indexOf(child);

                if (index > -1) {
                    this.store && this.store.deregisterNode(child);
                    child.parent = null;
                    this.childNodes.splice(index, 1);
                }

                this.updateLeafState();
            };

            Node.prototype.removeChildByData = function removeChildByData(data) {
                var targetNode = null;

                for (var i = 0; i < this.childNodes.length; i++) {
                    if (this.childNodes[i].data === data) {
                        targetNode = this.childNodes[i];
                        break;
                    }
                }

                if (targetNode) {
                    this.removeChild(targetNode);
                }
            };

            Node.prototype.expand = function expand(callback, expandParent) {
                var _this = this;

                var done = function done() {
                    if (expandParent) {
                        var parent = _this.parent;
                        while (parent.level > 0) {
                            parent.expanded = true;
                            parent = parent.parent;
                        }
                    }
                    _this.expanded = true;
                    if (callback) callback();
                };

                if (this.shouldLoadData()) {
                    this.loadData(function (data) {
                        if (data instanceof Array) {
                            if (_this.checked) {
                                _this.setChecked(true, true);
                            } else if (!_this.store.checkStrictly) {
                                reInitChecked(_this);
                            }
                            done();
                        }
                    });
                } else {
                    done();
                }
            };

            Node.prototype.doCreateChildren = function doCreateChildren(array) {
                var _this2 = this;

                var defaultProps = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

                array.forEach(function (item) {
                    _this2.insertChild(merge_default()({data: item}, defaultProps), undefined, true);
                });
            };

            Node.prototype.collapse = function collapse() {
                this.expanded = false;
            };

            Node.prototype.shouldLoadData = function shouldLoadData() {
                return this.store.lazy === true && this.store.load && !this.loaded;
            };

            Node.prototype.updateLeafState = function updateLeafState() {
                if (this.store.lazy === true && this.loaded !== true && typeof this.isLeafByUser !== 'undefined') {
                    this.isLeaf = this.isLeafByUser;
                    return;
                }
                var childNodes = this.childNodes;
                if (!this.store.lazy || this.store.lazy === true && this.loaded === true) {
                    this.isLeaf = !childNodes || childNodes.length === 0;
                    return;
                }
                this.isLeaf = false;
            };

            Node.prototype.setChecked = function setChecked(value, deep, recursion, passValue) {
                var _this3 = this;

                this.indeterminate = value === 'half';
                this.checked = value === true;

                if (this.store.checkStrictly) return;

                if (!(this.shouldLoadData() && !this.store.checkDescendants)) {
                    var _getChildState2 = getChildState(this.childNodes),
                        all = _getChildState2.all,
                        allWithoutDisable = _getChildState2.allWithoutDisable;

                    if (!this.isLeaf && !all && allWithoutDisable) {
                        this.checked = false;
                        value = false;
                    }

                    var handleDescendants = function handleDescendants() {
                        if (deep) {
                            var childNodes = _this3.childNodes;
                            for (var i = 0, j = childNodes.length; i < j; i++) {
                                var child = childNodes[i];
                                passValue = passValue || value !== false;
                                var isCheck = child.disabled ? child.checked : passValue;
                                child.setChecked(isCheck, deep, true, passValue);
                            }

                            var _getChildState3 = getChildState(childNodes),
                                half = _getChildState3.half,
                                _all = _getChildState3.all;

                            if (!_all) {
                                _this3.checked = _all;
                                _this3.indeterminate = half;
                            }
                        }
                    };

                    if (this.shouldLoadData()) {
                        // Only work on lazy load data.
                        this.loadData(function () {
                            handleDescendants();
                            reInitChecked(_this3);
                        }, {
                            checked: value !== false
                        });
                        return;
                    } else {
                        handleDescendants();
                    }
                }

                var parent = this.parent;
                if (!parent || parent.level === 0) return;

                if (!recursion) {
                    reInitChecked(parent);
                }
            };

            Node.prototype.getChildren = function getChildren() {
                var forceInit = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
                // this is data
                if (this.level === 0) return this.data;
                var data = this.data;
                if (!data) return null;

                var props = this.store.props;
                var children = 'children';
                if (props) {
                    children = props.children || 'children';
                }

                if (data[children] === undefined) {
                    data[children] = null;
                }

                if (forceInit && !data[children]) {
                    data[children] = [];
                }

                return data[children];
            };

            Node.prototype.updateChildren = function updateChildren() {
                var _this4 = this;

                var newData = this.getChildren() || [];
                var oldData = this.childNodes.map(function (node) {
                    return node.data;
                });

                var newDataMap = {};
                var newNodes = [];

                newData.forEach(function (item, index) {
                    var key = item[NODE_KEY];
                    var isNodeExists = !!key && Object(util_["arrayFindIndex"])(oldData, function (data) {
                        return data[NODE_KEY] === key;
                    }) >= 0;
                    if (isNodeExists) {
                        newDataMap[key] = {index: index, data: item};
                    } else {
                        newNodes.push({index: index, data: item});
                    }
                });

                if (!this.store.lazy) {
                    oldData.forEach(function (item) {
                        if (!newDataMap[item[NODE_KEY]]) _this4.removeChildByData(item);
                    });
                }

                newNodes.forEach(function (_ref) {
                    var index = _ref.index,
                        data = _ref.data;

                    _this4.insertChild({data: data}, index);
                });

                this.updateLeafState();
            };

            Node.prototype.loadData = function loadData(callback) {
                var _this5 = this;

                var defaultProps = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

                if (this.store.lazy === true && this.store.load && !this.loaded && (!this.loading || Object.keys(defaultProps).length)) {
                    this.loading = true;

                    var resolve = function resolve(children) {
                        _this5.loaded = true;
                        _this5.loading = false;
                        _this5.childNodes = [];

                        _this5.doCreateChildren(children, defaultProps);

                        _this5.updateLeafState();
                        if (callback) {
                            callback.call(_this5, children);
                        }
                    };

                    this.store.load(this, resolve);
                } else {
                    if (callback) {
                        callback.call(this);
                    }
                }
            };

            _createClass(Node, [{
                key: 'label',
                get: function get() {
                    return getPropertyFromData(this, 'label');
                }
            }, {
                key: 'key',
                get: function get() {
                    var nodeKey = this.store.key;
                    if (this.data) return this.data[nodeKey];
                    return null;
                }
            }, {
                key: 'disabled',
                get: function get() {
                    return getPropertyFromData(this, 'disabled');
                }
            }, {
                key: 'nextSibling',
                get: function get() {
                    var parent = this.parent;
                    if (parent) {
                        var index = parent.childNodes.indexOf(this);
                        if (index > -1) {
                            return parent.childNodes[index + 1];
                        }
                    }
                    return null;
                }
            }, {
                key: 'previousSibling',
                get: function get() {
                    var parent = this.parent;
                    if (parent) {
                        var index = parent.childNodes.indexOf(this);
                        if (index > -1) {
                            return index > 0 ? parent.childNodes[index - 1] : null;
                        }
                    }
                    return null;
                }
            }]);

            return Node;
        }();

        /* harmony default export */
        var model_node = (node_Node);
// CONCATENATED MODULE: ./packages/tree/src/model/tree-store.js
        var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
            return typeof obj;
        } : function (obj) {
            return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
        };

        function tree_store_classCallCheck(instance, Constructor) {
            if (!(instance instanceof Constructor)) {
                throw new TypeError("Cannot call a class as a function");
            }
        }


        var tree_store_TreeStore = function () {
            function TreeStore(options) {
                var _this = this;

                tree_store_classCallCheck(this, TreeStore);

                this.currentNode = null;
                this.currentNodeKey = null;

                for (var option in options) {
                    if (options.hasOwnProperty(option)) {
                        this[option] = options[option];
                    }
                }

                this.nodesMap = {};

                this.root = new model_node({
                    data: this.data,
                    store: this
                });

                if (this.lazy && this.load) {
                    var loadFn = this.load;
                    loadFn(this.root, function (data) {
                        _this.root.doCreateChildren(data);
                        _this._initDefaultCheckedNodes();
                    });
                } else {
                    this._initDefaultCheckedNodes();
                }
            }

            TreeStore.prototype.filter = function filter(value) {
                var filterNodeMethod = this.filterNodeMethod;
                var lazy = this.lazy;
                var traverse = function traverse(node) {
                    var childNodes = node.root ? node.root.childNodes : node.childNodes;

                    childNodes.forEach(function (child) {
                        child.visible = filterNodeMethod.call(child, value, child.data, child);

                        traverse(child);
                    });

                    if (!node.visible && childNodes.length) {
                        var allHidden = true;
                        allHidden = !childNodes.some(function (child) {
                            return child.visible;
                        });

                        if (node.root) {
                            node.root.visible = allHidden === false;
                        } else {
                            node.visible = allHidden === false;
                        }
                    }
                    if (!value) return;

                    if (node.visible && !node.isLeaf && !lazy) node.expand();
                };

                traverse(this);
            };

            TreeStore.prototype.setData = function setData(newVal) {
                var instanceChanged = newVal !== this.root.data;
                if (instanceChanged) {
                    this.root.setData(newVal);
                    this._initDefaultCheckedNodes();
                } else {
                    this.root.updateChildren();
                }
            };

            TreeStore.prototype.getNode = function getNode(data) {
                if (data instanceof model_node) return data;
                var key = (typeof data === 'undefined' ? 'undefined' : _typeof(data)) !== 'object' ? data : util_getNodeKey(this.key, data);
                return this.nodesMap[key] || null;
            };

            TreeStore.prototype.insertBefore = function insertBefore(data, refData) {
                var refNode = this.getNode(refData);
                refNode.parent.insertBefore({data: data}, refNode);
            };

            TreeStore.prototype.insertAfter = function insertAfter(data, refData) {
                var refNode = this.getNode(refData);
                refNode.parent.insertAfter({data: data}, refNode);
            };

            TreeStore.prototype.remove = function remove(data) {
                var node = this.getNode(data);

                if (node && node.parent) {
                    if (node === this.currentNode) {
                        this.currentNode = null;
                    }
                    node.parent.removeChild(node);
                }
            };

            TreeStore.prototype.append = function append(data, parentData) {
                var parentNode = parentData ? this.getNode(parentData) : this.root;

                if (parentNode) {
                    parentNode.insertChild({data: data});
                }
            };

            TreeStore.prototype._initDefaultCheckedNodes = function _initDefaultCheckedNodes() {
                var _this2 = this;

                var defaultCheckedKeys = this.defaultCheckedKeys || [];
                var nodesMap = this.nodesMap;

                defaultCheckedKeys.forEach(function (checkedKey) {
                    var node = nodesMap[checkedKey];

                    if (node) {
                        node.setChecked(true, !_this2.checkStrictly);
                    }
                });
            };

            TreeStore.prototype._initDefaultCheckedNode = function _initDefaultCheckedNode(node) {
                var defaultCheckedKeys = this.defaultCheckedKeys || [];

                if (defaultCheckedKeys.indexOf(node.key) !== -1) {
                    node.setChecked(true, !this.checkStrictly);
                }
            };

            TreeStore.prototype.setDefaultCheckedKey = function setDefaultCheckedKey(newVal) {
                if (newVal !== this.defaultCheckedKeys) {
                    this.defaultCheckedKeys = newVal;
                    this._initDefaultCheckedNodes();
                }
            };

            TreeStore.prototype.registerNode = function registerNode(node) {
                var key = this.key;
                if (!key || !node || !node.data) return;

                var nodeKey = node.key;
                if (nodeKey !== undefined) this.nodesMap[node.key] = node;
            };

            TreeStore.prototype.deregisterNode = function deregisterNode(node) {
                var _this3 = this;

                var key = this.key;
                if (!key || !node || !node.data) return;

                node.childNodes.forEach(function (child) {
                    _this3.deregisterNode(child);
                });

                delete this.nodesMap[node.key];
            };

            TreeStore.prototype.getCheckedNodes = function getCheckedNodes() {
                var leafOnly = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
                var includeHalfChecked = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

                var checkedNodes = [];
                var traverse = function traverse(node) {
                    var childNodes = node.root ? node.root.childNodes : node.childNodes;

                    childNodes.forEach(function (child) {
                        if ((child.checked || includeHalfChecked && child.indeterminate) && (!leafOnly || leafOnly && child.isLeaf)) {
                            checkedNodes.push(child.data);
                        }

                        traverse(child);
                    });
                };

                traverse(this);

                return checkedNodes;
            };

            TreeStore.prototype.getCheckedKeys = function getCheckedKeys() {
                var _this4 = this;

                var leafOnly = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;

                return this.getCheckedNodes(leafOnly).map(function (data) {
                    return (data || {})[_this4.key];
                });
            };

            TreeStore.prototype.getHalfCheckedNodes = function getHalfCheckedNodes() {
                var nodes = [];
                var traverse = function traverse(node) {
                    var childNodes = node.root ? node.root.childNodes : node.childNodes;

                    childNodes.forEach(function (child) {
                        if (child.indeterminate) {
                            nodes.push(child.data);
                        }

                        traverse(child);
                    });
                };

                traverse(this);

                return nodes;
            };

            TreeStore.prototype.getHalfCheckedKeys = function getHalfCheckedKeys() {
                var _this5 = this;

                return this.getHalfCheckedNodes().map(function (data) {
                    return (data || {})[_this5.key];
                });
            };

            TreeStore.prototype._getAllNodes = function _getAllNodes() {
                var allNodes = [];
                var nodesMap = this.nodesMap;
                for (var nodeKey in nodesMap) {
                    if (nodesMap.hasOwnProperty(nodeKey)) {
                        allNodes.push(nodesMap[nodeKey]);
                    }
                }

                return allNodes;
            };

            TreeStore.prototype.updateChildren = function updateChildren(key, data) {
                var node = this.nodesMap[key];
                if (!node) return;
                var childNodes = node.childNodes;
                for (var i = childNodes.length - 1; i >= 0; i--) {
                    var child = childNodes[i];
                    this.remove(child.data);
                }
                for (var _i = 0, j = data.length; _i < j; _i++) {
                    var _child = data[_i];
                    this.append(_child, node.data);
                }
            };

            TreeStore.prototype._setCheckedKeys = function _setCheckedKeys(key) {
                var leafOnly = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
                var checkedKeys = arguments[2];

                var allNodes = this._getAllNodes().sort(function (a, b) {
                    return b.level - a.level;
                });
                var cache = Object.create(null);
                var keys = Object.keys(checkedKeys);
                allNodes.forEach(function (node) {
                    return node.setChecked(false, false);
                });
                for (var i = 0, j = allNodes.length; i < j; i++) {
                    var node = allNodes[i];
                    var nodeKey = node.data[key].toString();
                    var checked = keys.indexOf(nodeKey) > -1;
                    if (!checked) {
                        if (node.checked && !cache[nodeKey]) {
                            node.setChecked(false, false);
                        }
                        continue;
                    }

                    var parent = node.parent;
                    while (parent && parent.level > 0) {
                        cache[parent.data[key]] = true;
                        parent = parent.parent;
                    }

                    if (node.isLeaf || this.checkStrictly) {
                        node.setChecked(true, false);
                        continue;
                    }
                    node.setChecked(true, true);

                    if (leafOnly) {
                        (function () {
                            node.setChecked(false, false);
                            var traverse = function traverse(node) {
                                var childNodes = node.childNodes;
                                childNodes.forEach(function (child) {
                                    if (!child.isLeaf) {
                                        child.setChecked(false, false);
                                    }
                                    traverse(child);
                                });
                            };
                            traverse(node);
                        })();
                    }
                }
            };

            TreeStore.prototype.setCheckedNodes = function setCheckedNodes(array) {
                var leafOnly = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

                var key = this.key;
                var checkedKeys = {};
                array.forEach(function (item) {
                    checkedKeys[(item || {})[key]] = true;
                });

                this._setCheckedKeys(key, leafOnly, checkedKeys);
            };

            TreeStore.prototype.setCheckedKeys = function setCheckedKeys(keys) {
                var leafOnly = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

                this.defaultCheckedKeys = keys;
                var key = this.key;
                var checkedKeys = {};
                keys.forEach(function (key) {
                    checkedKeys[key] = true;
                });

                this._setCheckedKeys(key, leafOnly, checkedKeys);
            };

            TreeStore.prototype.setDefaultExpandedKeys = function setDefaultExpandedKeys(keys) {
                var _this6 = this;

                keys = keys || [];
                this.defaultExpandedKeys = keys;

                keys.forEach(function (key) {
                    var node = _this6.getNode(key);
                    if (node) node.expand(null, _this6.autoExpandParent);
                });
            };

            TreeStore.prototype.setChecked = function setChecked(data, checked, deep) {
                var node = this.getNode(data);

                if (node) {
                    node.setChecked(!!checked, deep);
                }
            };

            TreeStore.prototype.getCurrentNode = function getCurrentNode() {
                return this.currentNode;
            };

            TreeStore.prototype.setCurrentNode = function setCurrentNode(currentNode) {
                var prevCurrentNode = this.currentNode;
                if (prevCurrentNode) {
                    prevCurrentNode.isCurrent = false;
                }
                this.currentNode = currentNode;
                this.currentNode.isCurrent = true;
            };

            TreeStore.prototype.setUserCurrentNode = function setUserCurrentNode(node) {
                var key = node[this.key];
                var currNode = this.nodesMap[key];
                this.setCurrentNode(currNode);
            };

            TreeStore.prototype.setCurrentNodeKey = function setCurrentNodeKey(key) {
                if (key === null || key === undefined) {
                    this.currentNode && (this.currentNode.isCurrent = false);
                    this.currentNode = null;
                    return;
                }
                var node = this.getNode(key);
                if (node) {
                    this.setCurrentNode(node);
                }
            };

            return TreeStore;
        }();

        /* harmony default export */
        var tree_store = (tree_store_TreeStore);
        ;
// CONCATENATED MODULE: ./node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!./node_modules/vue-loader/lib??vue-loader-options!./packages/tree/src/tree-node.vue?vue&type=template&id=3ba3ef0e&
        var tree_nodevue_type_template_id_3ba3ef0e_render = function () {
            var this$1 = this
            var _vm = this
            var _h = _vm.$createElement
            var _c = _vm._self._c || _h
            return _c(
                "div",
                {
                    directives: [
                        {
                            name: "show",
                            rawName: "v-show",
                            value: _vm.node.visible,
                            expression: "node.visible"
                        }
                    ],
                    ref: "node",
                    staticClass: "el-tree-node",
                    class: {
                        "is-expanded": _vm.expanded,
                        "is-current": _vm.node.isCurrent,
                        "is-hidden": !_vm.node.visible,
                        "is-focusable": !_vm.node.disabled,
                        "is-checked": !_vm.node.disabled && _vm.node.checked
                    },
                    attrs: {
                        role: "treeitem",
                        tabindex: "-1",
                        "aria-expanded": _vm.expanded,
                        "aria-disabled": _vm.node.disabled,
                        "aria-checked": _vm.node.checked,
                        draggable: _vm.tree.draggable
                    },
                    on: {
                        click: function ($event) {
                            $event.stopPropagation()
                            return _vm.handleClick($event)
                        },
                        contextmenu: function ($event) {
                            return this$1.handleContextMenu($event)
                        },
                        dragstart: function ($event) {
                            $event.stopPropagation()
                            return _vm.handleDragStart($event)
                        },
                        dragover: function ($event) {
                            $event.stopPropagation()
                            return _vm.handleDragOver($event)
                        },
                        dragend: function ($event) {
                            $event.stopPropagation()
                            return _vm.handleDragEnd($event)
                        },
                        drop: function ($event) {
                            $event.stopPropagation()
                            return _vm.handleDrop($event)
                        }
                    }
                },
                [
                    _c(
                        "div",
                        {
                            staticClass: "el-tree-node__content",
                            style: {
                                "padding-left": (_vm.node.level - 1) * _vm.tree.indent + "px"
                            }
                        },
                        [
                            _c("span", {
                                class: [
                                    {
                                        "is-leaf": _vm.node.isLeaf,
                                        expanded: !_vm.node.isLeaf && _vm.expanded
                                    },
                                    "el-tree-node__expand-icon",
                                    _vm.tree.iconClass ? _vm.tree.iconClass : "el-icon-caret-right"
                                ],
                                on: {
                                    click: function ($event) {
                                        $event.stopPropagation()
                                        return _vm.handleExpandIconClick($event)
                                    }
                                }
                            }),
                            _vm.showCheckbox
                                ? _c("el-checkbox", {
                                    attrs: {
                                        indeterminate: _vm.node.indeterminate,
                                        disabled: !!_vm.node.disabled
                                    },
                                    on: {change: _vm.handleCheckChange},
                                    nativeOn: {
                                        click: function ($event) {
                                            $event.stopPropagation()
                                        }
                                    },
                                    model: {
                                        value: _vm.node.checked,
                                        callback: function ($$v) {
                                            _vm.$set(_vm.node, "checked", $$v)
                                        },
                                        expression: "node.checked"
                                    }
                                })
                                : _vm._e(),
                            _vm.node.loading
                                ? _c("span", {
                                    staticClass: "el-tree-node__loading-icon el-icon-loading"
                                })
                                : _vm._e(),
                            _c("node-content", {attrs: {node: _vm.node}})
                        ],
                        1
                    ),
                    _c("el-collapse-transition", [
                        !_vm.renderAfterExpand || _vm.childNodeRendered
                            ? _c(
                            "div",
                            {
                                directives: [
                                    {
                                        name: "show",
                                        rawName: "v-show",
                                        value: _vm.expanded,
                                        expression: "expanded"
                                    }
                                ],
                                staticClass: "el-tree-node__children",
                                attrs: {role: "group", "aria-expanded": _vm.expanded}
                            },
                            _vm._l(_vm.node.childNodes, function (child) {
                                return _c("el-tree-node", {
                                    key: _vm.getNodeKey(child),
                                    attrs: {
                                        "render-content": _vm.renderContent,
                                        "render-after-expand": _vm.renderAfterExpand,
                                        "show-checkbox": _vm.showCheckbox,
                                        node: child
                                    },
                                    on: {"node-expand": _vm.handleChildNodeExpand}
                                })
                            }),
                            1
                            )
                            : _vm._e()
                    ])
                ],
                1
            )
        }
        var tree_nodevue_type_template_id_3ba3ef0e_staticRenderFns = []
        tree_nodevue_type_template_id_3ba3ef0e_render._withStripped = true


// CONCATENATED MODULE: ./packages/tree/src/tree-node.vue?vue&type=template&id=3ba3ef0e&

// EXTERNAL MODULE: external "element-ui/lib/transitions/collapse-transition"
        var collapse_transition_ = __webpack_require__(28);
        var collapse_transition_default = /*#__PURE__*/__webpack_require__.n(collapse_transition_);

// EXTERNAL MODULE: external "element-ui/lib/checkbox"
        var checkbox_ = __webpack_require__(18);
        var checkbox_default = /*#__PURE__*/__webpack_require__.n(checkbox_);

// EXTERNAL MODULE: external "element-ui/lib/mixins/emitter"
        var emitter_ = __webpack_require__(4);
        var emitter_default = /*#__PURE__*/__webpack_require__.n(emitter_);

// CONCATENATED MODULE: ./node_modules/babel-loader/lib!./node_modules/vue-loader/lib??vue-loader-options!./packages/tree/src/tree-node.vue?vue&type=script&lang=js&
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        /* harmony default export */
        var tree_nodevue_type_script_lang_js_ = ({
            name: 'ElTreeNode',

            componentName: 'ElTreeNode',

            mixins: [emitter_default.a],

            props: {
                node: {
                    default: function _default() {
                        return {};
                    }
                },
                props: {},
                renderContent: Function,
                renderAfterExpand: {
                    type: Boolean,
                    default: true
                },
                showCheckbox: {
                    type: Boolean,
                    default: false
                }
            },

            components: {
                ElCollapseTransition: collapse_transition_default.a,
                ElCheckbox: checkbox_default.a,
                NodeContent: {
                    props: {
                        node: {
                            required: true
                        }
                    },
                    render: function render(h) {
                        var parent = this.$parent;
                        var tree = parent.tree;
                        var node = this.node;
                        var data = node.data,
                            store = node.store;

                        return parent.renderContent ? parent.renderContent.call(parent._renderProxy, h, {
                            _self: tree.$vnode.context,
                            node: node,
                            data: data,
                            store: store
                        }) : tree.$scopedSlots.default ? tree.$scopedSlots.default({node: node, data: data}) : h(
                            'span',
                            {'class': 'el-tree-node__label'},
                            [node.label]
                        );
                    }
                }
            },

            data: function data() {
                return {
                    tree: null,
                    expanded: false,
                    childNodeRendered: false,
                    oldChecked: null,
                    oldIndeterminate: null
                };
            },


            watch: {
                'node.indeterminate': function nodeIndeterminate(val) {
                    this.handleSelectChange(this.node.checked, val);
                },
                'node.checked': function nodeChecked(val) {
                    this.handleSelectChange(val, this.node.indeterminate);
                },
                'node.expanded': function nodeExpanded(val) {
                    var _this = this;

                    this.$nextTick(function () {
                        return _this.expanded = val;
                    });
                    if (val) {
                        this.childNodeRendered = true;
                    }
                }
            },

            methods: {
                getNodeKey: function getNodeKey(node) {
                    return util_getNodeKey(this.tree.nodeKey, node.data);
                },
                handleSelectChange: function handleSelectChange(checked, indeterminate) {
                    if (this.oldChecked !== checked && this.oldIndeterminate !== indeterminate) {
                        this.tree.$emit('check-change', this.node.data, checked, indeterminate);
                    }
                    this.oldChecked = checked;
                    this.indeterminate = indeterminate;
                },
                handleClick: function handleClick() {
                    var store = this.tree.store;
                    store.setCurrentNode(this.node);
                    this.tree.$emit('current-change', store.currentNode ? store.currentNode.data : null, store.currentNode);
                    this.tree.currentNode = this;
                    if (this.tree.expandOnClickNode) {
                        this.handleExpandIconClick();
                    }
                    if (this.tree.checkOnClickNode && !this.node.disabled) {
                        this.handleCheckChange(null, {
                            target: {checked: !this.node.checked}
                        });
                    }
                    this.tree.$emit('node-click', this.node.data, this.node, this);
                },
                handleContextMenu: function handleContextMenu(event) {
                    if (this.tree._events['node-contextmenu'] && this.tree._events['node-contextmenu'].length > 0) {
                        event.stopPropagation();
                        event.preventDefault();
                    }
                    this.tree.$emit('node-contextmenu', event, this.node.data, this.node, this);
                },
                handleExpandIconClick: function handleExpandIconClick() {
                    if (this.node.isLeaf) return;
                    if (this.expanded) {
                        this.tree.$emit('node-collapse', this.node.data, this.node, this);
                        this.node.collapse();
                    } else {
                        this.node.expand();
                        this.$emit('node-expand', this.node.data, this.node, this);
                    }
                },
                handleCheckChange: function handleCheckChange(value, ev) {
                    var _this2 = this;

                    this.node.setChecked(ev.target.checked, !this.tree.checkStrictly);
                    this.$nextTick(function () {
                        var store = _this2.tree.store;
                        _this2.tree.$emit('check', _this2.node.data, {
                            checkedNodes: store.getCheckedNodes(),
                            checkedKeys: store.getCheckedKeys(),
                            halfCheckedNodes: store.getHalfCheckedNodes(),
                            halfCheckedKeys: store.getHalfCheckedKeys()
                        });
                    });
                },
                handleChildNodeExpand: function handleChildNodeExpand(nodeData, node, instance) {
                    this.broadcast('ElTreeNode', 'tree-node-expand', node);
                    this.tree.$emit('node-expand', nodeData, node, instance);
                },
                handleDragStart: function handleDragStart(event) {
                    if (!this.tree.draggable) return;
                    this.tree.$emit('tree-node-drag-start', event, this);
                },
                handleDragOver: function handleDragOver(event) {
                    if (!this.tree.draggable) return;
                    this.tree.$emit('tree-node-drag-over', event, this);
                    event.preventDefault();
                },
                handleDrop: function handleDrop(event) {
                    event.preventDefault();
                },
                handleDragEnd: function handleDragEnd(event) {
                    if (!this.tree.draggable) return;
                    this.tree.$emit('tree-node-drag-end', event, this);
                }
            },

            created: function created() {
                var _this3 = this;

                var parent = this.$parent;

                if (parent.isTree) {
                    this.tree = parent;
                } else {
                    this.tree = parent.tree;
                }

                var tree = this.tree;
                if (!tree) {
                    console.warn('Can not find node\'s tree.');
                }

                var props = tree.props || {};
                var childrenKey = props['children'] || 'children';

                this.$watch('node.data.' + childrenKey, function () {
                    _this3.node.updateChildren();
                });

                if (this.node.expanded) {
                    this.expanded = true;
                    this.childNodeRendered = true;
                }

                if (this.tree.accordion) {
                    this.$on('tree-node-expand', function (node) {
                        if (_this3.node !== node) {
                            _this3.node.collapse();
                        }
                    });
                }
            }
        });
// CONCATENATED MODULE: ./packages/tree/src/tree-node.vue?vue&type=script&lang=js&
        /* harmony default export */
        var src_tree_nodevue_type_script_lang_js_ = (tree_nodevue_type_script_lang_js_);
// EXTERNAL MODULE: ./node_modules/vue-loader/lib/runtime/componentNormalizer.js
        var componentNormalizer = __webpack_require__(0);

// CONCATENATED MODULE: ./packages/tree/src/tree-node.vue


        /* normalize component */

        var component = Object(componentNormalizer["a" /* default */])(
            src_tree_nodevue_type_script_lang_js_,
            tree_nodevue_type_template_id_3ba3ef0e_render,
            tree_nodevue_type_template_id_3ba3ef0e_staticRenderFns,
            false,
            null,
            null,
            null
        )

        /* hot reload */
        if (false) {
            var api;
        }
        component.options.__file = "packages/tree/src/tree-node.vue"
        /* harmony default export */
        var tree_node = (component.exports);
// EXTERNAL MODULE: external "element-ui/lib/locale"
        var locale_ = __webpack_require__(19);

// EXTERNAL MODULE: external "element-ui/lib/utils/dom"
        var dom_ = __webpack_require__(2);

// CONCATENATED MODULE: ./node_modules/babel-loader/lib!./node_modules/vue-loader/lib??vue-loader-options!./packages/tree/src/tree.vue?vue&type=script&lang=js&
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
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//
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//
//
//


        /* harmony default export */
        var treevue_type_script_lang_js_ = ({
            name: 'ElTree',

            mixins: [emitter_default.a],

            components: {
                ElTreeNode: tree_node
            },

            data: function data() {
                return {
                    store: null,
                    root: null,
                    currentNode: null,
                    treeItems: null,
                    checkboxItems: [],
                    dragState: {
                        showDropIndicator: false,
                        draggingNode: null,
                        dropNode: null,
                        allowDrop: true
                    }
                };
            },


            props: {
                data: {
                    type: Array
                },
                emptyText: {
                    type: String,
                    default: function _default() {
                        return Object(locale_["t"])('el.tree.emptyText');
                    }
                },
                renderAfterExpand: {
                    type: Boolean,
                    default: true
                },
                nodeKey: String,
                checkStrictly: Boolean,
                defaultExpandAll: Boolean,
                expandOnClickNode: {
                    type: Boolean,
                    default: true
                },
                checkOnClickNode: Boolean,
                checkDescendants: {
                    type: Boolean,
                    default: false
                },
                autoExpandParent: {
                    type: Boolean,
                    default: true
                },
                defaultCheckedKeys: Array,
                defaultExpandedKeys: Array,
                currentNodeKey: [String, Number],
                renderContent: Function,
                showCheckbox: {
                    type: Boolean,
                    default: false
                },
                draggable: {
                    type: Boolean,
                    default: false
                },
                allowDrag: Function,
                allowDrop: Function,
                props: {
                    default: function _default() {
                        return {
                            children: 'children',
                            label: 'label',
                            disabled: 'disabled'
                        };
                    }
                },
                lazy: {
                    type: Boolean,
                    default: false
                },
                highlightCurrent: Boolean,
                load: Function,
                filterNodeMethod: Function,
                accordion: Boolean,
                indent: {
                    type: Number,
                    default: 18
                },
                iconClass: String
            },

            computed: {
                children: {
                    set: function set(value) {
                        this.data = value;
                    },
                    get: function get() {
                        return this.data;
                    }
                },

                treeItemArray: function treeItemArray() {
                    return Array.prototype.slice.call(this.treeItems);
                },
                isEmpty: function isEmpty() {
                    var childNodes = this.root.childNodes;

                    return !childNodes || childNodes.length === 0 || childNodes.every(function (_ref) {
                        var visible = _ref.visible;
                        return !visible;
                    });
                }
            },

            watch: {
                defaultCheckedKeys: function defaultCheckedKeys(newVal) {
                    this.store.setDefaultCheckedKey(newVal);
                },
                defaultExpandedKeys: function defaultExpandedKeys(newVal) {
                    this.store.defaultExpandedKeys = newVal;
                    this.store.setDefaultExpandedKeys(newVal);
                },
                data: function data(newVal) {
                    this.store.setData(newVal);
                },
                checkboxItems: function checkboxItems(val) {
                    Array.prototype.forEach.call(val, function (checkbox) {
                        checkbox.setAttribute('tabindex', -1);
                    });
                },
                checkStrictly: function checkStrictly(newVal) {
                    this.store.checkStrictly = newVal;
                }
            },

            methods: {
                filter: function filter(value) {
                    if (!this.filterNodeMethod) throw new Error('[Tree] filterNodeMethod is required when filter');
                    this.store.filter(value);
                },
                getNodeKey: function getNodeKey(node) {
                    return util_getNodeKey(this.nodeKey, node.data);
                },
                getNodePath: function getNodePath(data) {
                    if (!this.nodeKey) throw new Error('[Tree] nodeKey is required in getNodePath');
                    var node = this.store.getNode(data);
                    if (!node) return [];
                    var path = [node.data];
                    var parent = node.parent;
                    while (parent && parent !== this.root) {
                        path.push(parent.data);
                        parent = parent.parent;
                    }
                    return path.reverse();
                },
                getCheckedNodes: function getCheckedNodes(leafOnly, includeHalfChecked) {
                    return this.store.getCheckedNodes(leafOnly, includeHalfChecked);
                },
                getCheckedKeys: function getCheckedKeys(leafOnly) {
                    return this.store.getCheckedKeys(leafOnly);
                },
                getCurrentNode: function getCurrentNode() {
                    var currentNode = this.store.getCurrentNode();
                    return currentNode ? currentNode.data : null;
                },
                getCurrentKey: function getCurrentKey() {
                    if (!this.nodeKey) throw new Error('[Tree] nodeKey is required in getCurrentKey');
                    var currentNode = this.getCurrentNode();
                    return currentNode ? currentNode[this.nodeKey] : null;
                },
                setCheckedNodes: function setCheckedNodes(nodes, leafOnly) {
                    if (!this.nodeKey) throw new Error('[Tree] nodeKey is required in setCheckedNodes');
                    this.store.setCheckedNodes(nodes, leafOnly);
                },
                setCheckedKeys: function setCheckedKeys(keys, leafOnly) {
                    if (!this.nodeKey) throw new Error('[Tree] nodeKey is required in setCheckedKeys');
                    this.store.setCheckedKeys(keys, leafOnly);
                },
                setChecked: function setChecked(data, checked, deep) {
                    this.store.setChecked(data, checked, deep);
                },
                getHalfCheckedNodes: function getHalfCheckedNodes() {
                    return this.store.getHalfCheckedNodes();
                },
                getHalfCheckedKeys: function getHalfCheckedKeys() {
                    return this.store.getHalfCheckedKeys();
                },
                setCurrentNode: function setCurrentNode(node) {
                    if (!this.nodeKey) throw new Error('[Tree] nodeKey is required in setCurrentNode');
                    this.store.setUserCurrentNode(node);
                },
                setCurrentKey: function setCurrentKey(key) {
                    if (!this.nodeKey) throw new Error('[Tree] nodeKey is required in setCurrentKey');
                    this.store.setCurrentNodeKey(key);
                },
                getNode: function getNode(data) {
                    return this.store.getNode(data);
                },
                remove: function remove(data) {
                    this.store.remove(data);
                },
                append: function append(data, parentNode) {
                    this.store.append(data, parentNode);
                },
                insertBefore: function insertBefore(data, refNode) {
                    this.store.insertBefore(data, refNode);
                },
                insertAfter: function insertAfter(data, refNode) {
                    this.store.insertAfter(data, refNode);
                },
                handleNodeExpand: function handleNodeExpand(nodeData, node, instance) {
                    this.broadcast('ElTreeNode', 'tree-node-expand', node);
                    this.$emit('node-expand', nodeData, node, instance);
                },
                updateKeyChildren: function updateKeyChildren(key, data) {
                    if (!this.nodeKey) throw new Error('[Tree] nodeKey is required in updateKeyChild');
                    this.store.updateChildren(key, data);
                },
                initTabIndex: function initTabIndex() {
                    this.treeItems = this.$el.querySelectorAll('.is-focusable[role=treeitem]');
                    this.checkboxItems = this.$el.querySelectorAll('input[type=checkbox]');
                    var checkedItem = this.$el.querySelectorAll('.is-checked[role=treeitem]');
                    if (checkedItem.length) {
                        checkedItem[0].setAttribute('tabindex', 0);
                        return;
                    }
                    this.treeItems[0] && this.treeItems[0].setAttribute('tabindex', 0);
                },
                handleKeydown: function handleKeydown(ev) {
                    var currentItem = ev.target;
                    if (currentItem.className.indexOf('el-tree-node') === -1) return;
                    var keyCode = ev.keyCode;
                    this.treeItems = this.$el.querySelectorAll('.is-focusable[role=treeitem]');
                    var currentIndex = this.treeItemArray.indexOf(currentItem);
                    var nextIndex = void 0;
                    if ([38, 40].indexOf(keyCode) > -1) {
                        // up、down
                        ev.preventDefault();
                        if (keyCode === 38) {
                            // up
                            nextIndex = currentIndex !== 0 ? currentIndex - 1 : 0;
                        } else {
                            nextIndex = currentIndex < this.treeItemArray.length - 1 ? currentIndex + 1 : 0;
                        }
                        this.treeItemArray[nextIndex].focus(); // 选中
                    }
                    if ([37, 39].indexOf(keyCode) > -1) {
                        // left、right 展开
                        ev.preventDefault();
                        currentItem.click(); // 选中
                    }
                    var hasInput = currentItem.querySelector('[type="checkbox"]');
                    if ([13, 32].indexOf(keyCode) > -1 && hasInput) {
                        // space enter选中checkbox
                        ev.preventDefault();
                        hasInput.click();
                    }
                }
            },

            created: function created() {
                var _this = this;

                this.isTree = true;

                this.store = new tree_store({
                    key: this.nodeKey,
                    data: this.data,
                    lazy: this.lazy,
                    props: this.props,
                    load: this.load,
                    currentNodeKey: this.currentNodeKey,
                    checkStrictly: this.checkStrictly,
                    checkDescendants: this.checkDescendants,
                    defaultCheckedKeys: this.defaultCheckedKeys,
                    defaultExpandedKeys: this.defaultExpandedKeys,
                    autoExpandParent: this.autoExpandParent,
                    defaultExpandAll: this.defaultExpandAll,
                    filterNodeMethod: this.filterNodeMethod
                });

                this.root = this.store.root;

                var dragState = this.dragState;
                this.$on('tree-node-drag-start', function (event, treeNode) {
                    if (typeof _this.allowDrag === 'function' && !_this.allowDrag(treeNode.node)) {
                        event.preventDefault();
                        return false;
                    }
                    event.dataTransfer.effectAllowed = 'move';

                    // wrap in try catch to address IE's error when first param is 'text/plain'
                    try {
                        // setData is required for draggable to work in FireFox
                        // the content has to be '' so dragging a node out of the tree won't open a new tab in FireFox
                        event.dataTransfer.setData('text/plain', '');
                    } catch (e) {
                    }
                    dragState.draggingNode = treeNode;
                    _this.$emit('node-drag-start', treeNode.node, event);
                });

                this.$on('tree-node-drag-over', function (event, treeNode) {
                    var dropNode = findNearestComponent(event.target, 'ElTreeNode');
                    var oldDropNode = dragState.dropNode;
                    if (oldDropNode && oldDropNode !== dropNode) {
                        Object(dom_["removeClass"])(oldDropNode.$el, 'is-drop-inner');
                    }
                    var draggingNode = dragState.draggingNode;
                    if (!draggingNode || !dropNode) return;

                    var dropPrev = true;
                    var dropInner = true;
                    var dropNext = true;
                    var userAllowDropInner = true;
                    if (typeof _this.allowDrop === 'function') {
                        dropPrev = _this.allowDrop(draggingNode.node, dropNode.node, 'prev');
                        userAllowDropInner = dropInner = _this.allowDrop(draggingNode.node, dropNode.node, 'inner');
                        dropNext = _this.allowDrop(draggingNode.node, dropNode.node, 'next');
                    }
                    event.dataTransfer.dropEffect = dropInner ? 'move' : 'none';
                    if ((dropPrev || dropInner || dropNext) && oldDropNode !== dropNode) {
                        if (oldDropNode) {
                            _this.$emit('node-drag-leave', draggingNode.node, oldDropNode.node, event);
                        }
                        _this.$emit('node-drag-enter', draggingNode.node, dropNode.node, event);
                    }

                    if (dropPrev || dropInner || dropNext) {
                        dragState.dropNode = dropNode;
                    }

                    if (dropNode.node.nextSibling === draggingNode.node) {
                        dropNext = false;
                    }
                    if (dropNode.node.previousSibling === draggingNode.node) {
                        dropPrev = false;
                    }
                    if (dropNode.node.contains(draggingNode.node, false)) {
                        dropInner = false;
                    }
                    if (draggingNode.node === dropNode.node || draggingNode.node.contains(dropNode.node)) {
                        dropPrev = false;
                        dropInner = false;
                        dropNext = false;
                    }

                    var targetPosition = dropNode.$el.getBoundingClientRect();
                    var treePosition = _this.$el.getBoundingClientRect();

                    var dropType = void 0;
                    var prevPercent = dropPrev ? dropInner ? 0.25 : dropNext ? 0.45 : 1 : -1;
                    var nextPercent = dropNext ? dropInner ? 0.75 : dropPrev ? 0.55 : 0 : 1;

                    var indicatorTop = -9999;
                    var distance = event.clientY - targetPosition.top;
                    if (distance < targetPosition.height * prevPercent) {
                        dropType = 'before';
                    } else if (distance > targetPosition.height * nextPercent) {
                        dropType = 'after';
                    } else if (dropInner) {
                        dropType = 'inner';
                    } else {
                        dropType = 'none';
                    }

                    var iconPosition = dropNode.$el.querySelector('.el-tree-node__expand-icon').getBoundingClientRect();
                    var dropIndicator = _this.$refs.dropIndicator;
                    if (dropType === 'before') {
                        indicatorTop = iconPosition.top - treePosition.top;
                    } else if (dropType === 'after') {
                        indicatorTop = iconPosition.bottom - treePosition.top;
                    }
                    dropIndicator.style.top = indicatorTop + 'px';
                    dropIndicator.style.left = iconPosition.right - treePosition.left + 'px';

                    if (dropType === 'inner') {
                        Object(dom_["addClass"])(dropNode.$el, 'is-drop-inner');
                    } else {
                        Object(dom_["removeClass"])(dropNode.$el, 'is-drop-inner');
                    }

                    dragState.showDropIndicator = dropType === 'before' || dropType === 'after';
                    dragState.allowDrop = dragState.showDropIndicator || userAllowDropInner;
                    dragState.dropType = dropType;
                    _this.$emit('node-drag-over', draggingNode.node, dropNode.node, event);
                });

                this.$on('tree-node-drag-end', function (event) {
                    var draggingNode = dragState.draggingNode,
                        dropType = dragState.dropType,
                        dropNode = dragState.dropNode;

                    event.preventDefault();
                    event.dataTransfer.dropEffect = 'move';

                    if (draggingNode && dropNode) {
                        var draggingNodeCopy = {data: draggingNode.node.data};
                        if (dropType !== 'none') {
                            draggingNode.node.remove();
                        }
                        if (dropType === 'before') {
                            dropNode.node.parent.insertBefore(draggingNodeCopy, dropNode.node);
                        } else if (dropType === 'after') {
                            dropNode.node.parent.insertAfter(draggingNodeCopy, dropNode.node);
                        } else if (dropType === 'inner') {
                            dropNode.node.insertChild(draggingNodeCopy);
                        }
                        if (dropType !== 'none') {
                            _this.store.registerNode(draggingNodeCopy);
                        }

                        Object(dom_["removeClass"])(dropNode.$el, 'is-drop-inner');

                        _this.$emit('node-drag-end', draggingNode.node, dropNode.node, dropType, event);
                        if (dropType !== 'none') {
                            _this.$emit('node-drop', draggingNode.node, dropNode.node, dropType, event);
                        }
                    }
                    if (draggingNode && !dropNode) {
                        _this.$emit('node-drag-end', draggingNode.node, null, dropType, event);
                    }

                    dragState.showDropIndicator = false;
                    dragState.draggingNode = null;
                    dragState.dropNode = null;
                    dragState.allowDrop = true;
                });
            },
            mounted: function mounted() {
                this.initTabIndex();
                this.$el.addEventListener('keydown', this.handleKeydown);
            },
            updated: function updated() {
                this.treeItems = this.$el.querySelectorAll('[role=treeitem]');
                this.checkboxItems = this.$el.querySelectorAll('input[type=checkbox]');
            }
        });
// CONCATENATED MODULE: ./packages/tree/src/tree.vue?vue&type=script&lang=js&
        /* harmony default export */
        var src_treevue_type_script_lang_js_ = (treevue_type_script_lang_js_);
// CONCATENATED MODULE: ./packages/tree/src/tree.vue


        /* normalize component */

        var tree_component = Object(componentNormalizer["a" /* default */])(
            src_treevue_type_script_lang_js_,
            render,
            staticRenderFns,
            false,
            null,
            null,
            null
        )

        /* hot reload */
        if (false) {
            var tree_api;
        }
        tree_component.options.__file = "packages/tree/src/tree.vue"
        /* harmony default export */
        var tree = (tree_component.exports);
// CONCATENATED MODULE: ./packages/tree/index.js


        /* istanbul ignore next */
        tree.install = function (Vue) {
            Vue.component(tree.name, tree);
        };

        /* harmony default export */
        var packages_tree = __webpack_exports__["default"] = (tree);

        /***/
    }),

    /***/ 9:
    /***/ (function (module, exports) {

        module.exports = require("element-ui/lib/utils/merge");

        /***/
    })

    /******/
});